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Lead shot questions

I have a few questions about lead shot as mass loading for speakers.

Is the shot placed loose internally? Bagged? I really dont like the idea of stacking bags on top of the speaker.

What do you do with the acoustic-fil or liners?

Any pointers on getting the shot inside the speaker? Woofer removal, or input terminal removal, or just a common sense lowest point available?

Lastly, with my B & W CDM-9NTs, do you think it would be a worthwhile endeavor?

Thanks in advance.
distortion
theaudiotweak
2,796 posts
 
Its not a cure for the bass or any other frequency..Its a sponge that sucks the life out of the speaker or the stand filled with shot underneath. The lead is not sensitive to any selected bandpass of frequencys..They all become screwed up.Tom
audiobugged
528 posts
 
If I hadn't upgraded to Talon Khorus's, I would have upgraded the cheesie binding posts on the Cdm-9nt's to Silver WBT's. Then while inside I would have re-wired them with siltech wire with an iternal jumper. I really don't think 9 pounds of lead atop would aid this speaker.
maril555
619 posts
 
Where can one buy coated lead shot? Being a physician, I'm little worried about using uncoated lead in my house. I have Von Schweikert VR-4JR's and VSA recommends using 50 lbs. of lead shot in each. Speakers do have specifically designed built-in lead- fillable enclosure. Regards.
mechans
3,048 posts
 
I used steel coated lead shot in the desgnated base compartments of my VR2s to improve the bass response. It appears to have worked well. The steel coating and isolated chamber should keep contamination at bay. I didn't listen to the speakers at length before adding the shot, because it was recommended by VSA as part of setting them up. I can say that they stage very nicely, therefore, I think the deadening effect, if any, is minimal. I just heard a system that was heavily braced both with lead on top and around the bottom with a total of 4 X 25lb bags per speaker which the owner is certain improved the bass response. I can't be sure if the staging was makedly affected because I never heard the system without the loading.
distortion OP
571 posts
 
Audiobugged, I agree, 9Lbs will just be an experiment, I dont expect much. Rewiring and upgrading the binding post sounds like a great "tweaker" project. Thanks for the great ideas.

Maril, I am not sure but you could try a local sporting goods store. They may have coated shot for reloading shotgun ammo. You can also buy small bags of loose lead shot in heavy duty bags at a dive shop, though expect to pay more for it. I also saw some stainless steel here on A'gon a few weeks ago, try a search if you're interested.
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